Multifunction / Loop / Transmitter / Universal Calibrator UniCal 38531

The Universal Calibrator (UniCal 38531) are handheld, battery-operated, precision instruments designed for sourcing as well as measuring mV, V, mA and Ohm signals. It is designed to calibrate a broad spectrum of instruments from moving coil meters to process control systems and retain its precision over long periods in wide environmental conditions. An exceptionally stable voltage/current source provides continuously variable precision mV/V/mA/Ω output signals with two ten-turn potentiometers. A self-check facility establishes correct functioning of all circuit blocks.

Features

Precisely sources and measures mV, V, mA and Ohms
Range : 2000Ω, 20mA, 200mV, 20V
Resolution : 0.1Ω, 1uA, 10μV, 1mV
Accuracy: ± 0.02% of rdg ± 0.01% of FS ± 2 dgts
Available in 3½ and 4½ digit LCD display
Acts as transmitter simulator with loop power of 24 V
Provides 24V and measures 2-wire transmitter at a time
Acts as RTD simulator and T/C simulator
Works a voltage regulator and current regulator
Covers most of the process control instruments
Uses 6 AA Ni-Cd batteries with longer life for field use
Unique Self-Check facility ensures reliability

StartStop

Technical Specifications

Specification

Display

3½ digit	12 mm LCD with a resolution of 1 in 2,000
4½ digit	8 mm LCD with a resolution of 1 in 20,000

I/O Option	Display	Function & Ranges Switches				Resolution
A	3½	20mA	200Ω	200mV	N/Z	1 in 2,000
C	3½	20mA	200Ω	2V	X1/X10	1 in 2,000
D	4½	20mA	2000Ω	20V		1 in 2,0000
E	4½	20mA	200Ω	20V		1 in 2,0000
F	4½	20mA	2000Ω	20V	X1/X10	1 in 2,0000

Notes

N/Z	N-Normal and Z-Zero Suppression
X1/X10	X1-Multiplied by 1 and X10-Multiplied by 10

Input Impedance

Voltage	> 1 Megohm
Current	1 or 10 ohm depending on range
Ohms	Bright current of 0.1/1 mA depending on range

Input Protection

Voltage/Ohms	Input Terminals Protected for 24 V DC in Voltage & Ohms modes
Current	Input Terminals Protected for upto double the mA range

Output Impedance

Voltage	< 0.05 ohm
Current	> 1 Megohm

Source Capacity at 90% Bat Volt

Voltage	Up to 250 mV minimum into 250Ω
Current	Up to 20mA minimum into 250Ω (800Ω with loop power of 24V)
Ohms	Up to the maximum specified range

Accuracy and Self-Check @ operating temperature between 22-32 °C and valid for one year Calibration Cycle:

	Accuracy	Self-Check (on the display)
3½ digit	±0.05% of rdg ±0.02% of f.s. ±1 dgt	1777±1
4½ digit	±0.02% of rdg ±0.01% of f.s. ±2 dgts	17777±2

Power Supply options are as follows:

Option	Battery Type	Battery Life
A	6 AA size dry cells - 9 V	5 ~ 6 Hrs in continuous use at 12mA output
B	6 AA size Ni-Cd (rechargeable) cells - 8.1 V	10 ~ 12 Hrs in continuous use at 12mA output

Low Battery	Indicated by lighting all decimals or "LO BAT" indicator
Mains Operation	A Jack is provided for an external Battery Eliminator/Charger

Rated Temp	5 to 55 °C
Humidity	<90% RH (Non-Condensing)
Zero Drift	< 1dgt for every 10°C beyond the specified ambient of 22 - 32 °C
Span Drift	< 0.0015% of rdg / °C
Storage Temp	0 to 70 °C (Without Batteries)

Enclosure Size	125(W) x 200(H) x 55(D) mm
Enclosure Finish	Powder Coated
Enclosure Weight	1.0 Kg (Without Batteries & Accessories)

Battery eliminator
6 AA sized batteries - dry OR rechargeable (with charger)
Probe set
Durable leather case
Specially designed wooden box
User Manual
Warranty Certificate for 2 years against Mfg defects
Calibration Certificate Traceable to NPL

Multifunction Calibrators

RTD Simulators

T/C Simulators

Process Calibrators

Temperature Indicators

Temperature Scanners

Process Indicators

Support

Service upto 10 yrs
Calibration in < 72 Hours
Thorough analysis for repairs
Repair completion in < 1 week