CALsys -30/110 Tempsens Instrument Việt Nam

Hãng:
Tempsens Instrument
xuất xứ:
India
Giá bán:
LH-0914981967

Công Ty TNHH TM và DV Tăng Minh Phát là nhà phân phối chính thức của hãng Tempsens Instrument tại Việt Nam.

CALsys -30/110 Tempsens Instrument Việt Nam 

CALsys -30/110   CALsys -15/110   CALsys -120SP   CALsys -250   CALsys -650   CALsys -1200

An evaluation report of the CALsys -30/110 Dry block bath

Manufactured by Tempsens Instruments (II) Pvt Ltd

INTRODUCTION

The CALsys -30/110 is the latest version of Tempsens most popular High Accuracy Dry Block calibration Bath. It works over the temperature range -30 Deg C to 110 Deg C.

At Tempsens it is our earnest desire to present for our customers consideration as much useful information as possible and to this end we have spent a substantial amount of time evaluating our products.

The results of the evaluation of an Accuracy liquid calibration Bath can be presented in many formats some of which will give an optimistic or indeed a pessimistic view of how the products operate.

CALsys -30/110 Tempsens Instrument Việt Nam

A. Radial Temperature Homogeneity:

What is Radial Temperature Homogeneity and why it is important to measure

Radial uniformity refers to temperature differences between wells of the block or sleeve. This nonuniformity is strongly influenced by the difference between the block and ambient temperature.  A larger  temperature  difference  from ambient  will result  in  a  larger  potential temperature calibration error. Therefore radial inhomogeneity should be measured at extremes (relative to ambient temperature) in an instruments temperature range.

Test method:

The temperature differences between the zones in the individual bores provided for the measurements are measured with one or several suitable thermometers at three different temperature representative of the fielof application ancoverinthe extreme temperature which may occur. If there is only one bore no measurement has to be carried out.

For CALsys -30/110, we consider -30 Deg C, 0 Deg C and 110 Deg C respectively. As example at 50 Deg C two RTD (designed for small steam conduction) were placed in each of the holes. Measurements were recorded and then the probes were interchanged between the two pockets and repeat measurements made. The temperature Difference was calculated to remove the small offsets between the two probes.

For calibrators having fewer than four wells, it may be necessary to determine differences by cyclic exchange. The difference between two wells with two thermometers may be determined with the following Formula:

Temperature Difference = [((P1W1 – P1W2) + (P2W1 - P2W2)) / 2}]

Note: P1 = probe 1, W1 = well 1 and so on. P1W1 is read as the value of probe 1 in well 1.

CALsys -30/110 Tempsens Instrument Việt Nam

Radial Temperature Homogeneity at CALsys -30/110

Temp (Deg C)

Sensor

Hole 1

Hole 3

-30

RTD Sr.No. 438

-30.550

-30.610

RTD Sr.No. 4391

-30.582

-30.640

Radial Uniformity : +/-0.059

Temp (Deg C)

Sensor

Hole 1

Hole 3

0

RTD Sr.No 438

-0.33

-0.21

RTD Sr.No 4391

-0.35

-0.31

Radial Uniformity : +/-0.07

Temp (Deg C)

Sensor

Hole 1

Hole 3

110

RTD Sr.No. 438

110.66

110.69

RTD Sr.No. 4391

110.64

110.75

Radial Uniformity : +/-0.07

B. Temperature Stability

Temperature stability is measured with a thermometer and readout with adequate sensitivity and resolution to measure the control fluctuations in the block. A typical time period for stability measurements of a dry-well is about 30 minutes at any specific temperature. Other time periods may be applied depending on how the calibrator is to be used. Temperature stability may vary at different temperatures. The instrument should be characterized over its range, and typically three sets of stability measurements are adequate. Dry-wells that are heated only (that is they utilize no cooling systems to achieve below-ambient temperatures) are measured at their maximum and minimum temperatures and at the midpoint of their ranges. Stability measurements for cold dry- wells are made at their maximum and minimum temperatures as well as near room temperature. Specific temperatures of interest by the user may also be incorporated.

Test Method:

Stability is the measure of the temperature deviations over the measurement period, after temperature control has stabilized. The stability data can be viewed in two ways (see Figure 3). What  may  be  called  peak”  stabilitis  often  evaluated  as  plus  or  minus  (±)  one-half  the difference between of the maximum and minimum values of the data set:

Peak Stability = ± (Tmax – Tmin) / 2.

Temp Set Point

Maximum

Minimum

Peak Stability

-30 Deg C

-30.70

-30.69

0.005

0 Deg C

-0.41

-0.39

0.010

110 Deg C

110.70

110.68

0.010

LOW TEMPERATURE DRY BLOCK CALIBRATOR Calsys -30/110 is low temperature dry block furnace. The  dry  block  furnace  based  on     thermoelectric cooling  circuitry.  This  model  provides  an  special design isothermal enclosure ( Aluminium block) in which   the   thermocouple/RTD  can  be  calibrated agains the   temperature   o the   calibrator.   The calibrator  controller  uses  a  precision  RTD  as  a controlling sensor and controls the well temperature with thermoelectric cooler. To obtain and maintain a required temperature the controller varies the power to  the  heater  via  solid-state  relay.  There  is  one electricity  driven  fan  which  is  situated  under  the heating chamber for cooling the heater. The dry block calibrator was designed for portability, moderate cost and ease of operation.

KEY FEATURES
Wide Operating Range (-30 to110°C)
High Stability
PC Interfacing
Simple to use and cost effective
Portability
Low temperature calibration facility upto -30°C
Conveniently handle and calibration
Light Weight

Temperature Range                    : -30 to 110 °C

Temperature Resolution           : 0.1°C

Stability                                         : ±0.04°C at -30°C±0.06°C at 0°C±0.07°C at 110°C

Uniformity                                    : ±0.05°C at -30°C±0.07°C at 0°C±0.08°C at 110°C

Controlling Sensor                      : Precision PRT

Method of Control                     : Digital self tunedPID Controller

Fixed Insert Construction          : 1 hole of 8mm and 2 hole of 6.5mm with 120mm length

Time to Reach Max/Min Temp : 10/20 Mins

Operating Temperature             : 20 to 25°C

Computer Interface                    : RS - 232

Power Requirement                   : 230 VAC, 500 W

Dimensions                                  : 380(H) x 170(W) x188(D) mm

Weight                                          : 11.70Kg (without packing)

CALsys -30/110 Tempsens Instrument Việt NamCALsys -30/110 Tempsens Instrument Việt NamCALsys -30/110 Tempsens Instrument Việt NamCALsys -30/110 Tempsens Instrument Việt NamCALsys -30/110 Tempsens Instrument Việt Nam

CALsys -15/110
Temperature Range:
-15 to 110°C

Stability: 
±0.03°C

Temperature Resolution: 
0.1°C

CALsys 120SP (Dry cum Liquid Bath)
Temperature Range:
0 to 120°C

Stability: 
±0.03°C

Uniformity: 
±0.05°C

Temperature Resolution: 
0.1°C

CALsys 250
Temperature Range:
50 to 250°C

Stability: 
±0.015°C

Uniformity: 
±0.02°C

Temperature Resolution: 
0.1°C

CALsys 650
Temperature Range:
50 to 650°C

Stability: 
±0.025°C

Uniformity: 
±0.04°C

Temperature Resolution: 
0.1°C

CALsys 1200
Temperature Range:
250 to 1200°C

Stability: 
±0.1°C

Uniformity: 
±0.2°C

Temperature Resolution: 
1.0°C

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