Scientific instruments

0°C standard temperature device ZERO-CON

ZERO-CON continuously maintains the highly accurate 0°C standard temperature for long periods by automatically keeping a certain amount of ice and water during volume expansion caused by the freezing of pure water in an enclosed container by thermoelectric cooling.
ZERO-CON is popular among users as the indispensable instrument for continuously measuring and verifying precision temperatures.

Features

1. Correct 0°C is accurately controlled.
2. It can be operated only by turning on the switch since thermoelectric cooling type has been adopted. Complex operation and maintenance are not necessary.
3. It can be operated continuously for long periods.
4. Various kinds of thermocouples can be built-in at your request.

Applications

1. For cold junction of various kinds of thermocouples for precision temperature measuring and control.
2. For verification and correction of temperature sensor of various kinds of thermocouples, thermistors, and platinum resistors, and temperature measuring devices and temperature controllers.
3. For the multi-point precision temperature control system such as the temperature data collecting system.


Principle Block Diagram	Configuration of one pair built-in thermocouple

◇Performance

Model	ZC-114A
Setting standard temperature	0°C
Standard temperature stability accuracy Ambient temperature 5°C Ambient temperature 10°C Ambient temperature 15°C Ambient temperature 20°C Ambient temperature 25°C Ambient temperature 30°C	0°C - 0.005°C 0°C - 0.010°C 0°C - 0.015°C 0°C - 0.020°C 0°C - 0.025°C 0°C - 0.030°C
Temperature control accuracy	±0.001°C - ±0.005°C
Allowable ambient temperature	2°C - 30°C
Starting preparation waiting time Ambient temperature 20°C Ambient temperature 25°C Ambient temperature 30°C	Approx. 25 minutes Approx. 35 minutes Approx. 45 minutes

◇Specifications

Model	ZC-114A	ZC-114A/ZA-10/ZA-20
Sample input port (inner pipe)	Port diameter: 6.7mm Overall depth: 140mm Dip wire depth: 120mm	-
Thermoelectric element	Peltier-Module
Heat dissipation method	Forced air cooling
Power requirement	100VAC ±10V 50/60Hz MAX 100VA
Outer dimensions	W200 X D270 X H298mm ±1mm	W200 X D270 X H340mm ±1mm
Weight	Approx. 12Kg	Approx. 13Kg

◇Thermocouple Built-in Type Specifications

Model	ZC-114A/ZA-10	ZC-114A/ZA-20
Built-in thermocouple pair number	10	20
Built-in thermocouple type	R,J,E,K,T at your request
Remarks	High accuracy thermocouple wire and dedicated terminal are used. Combination of several kinds is also possible at your request. In each case, accuracy is within 0.5 ℃.

The above-mentioned specification might change without a previous notice.
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