Process Calibrator YHS787
- YHS787 Process Meter is a portable test tool with power supplied by the battery. Besides all the functions featured by the multimeter, it can also service and verify field instruments with steady current or linear changing current, and can provide loop power with voltage higher than 24V.

- The YHS787 Process Meter complies with EN61010, ANSI/ISA S82.01-1994 and CAN/CSA C22.2 No. 1010.1-92. It is rated 1000 V Overvoltage Category III.

- Output Function
* Source Current Output: 0-24mA, ± (0.05% Rdg+5lsd)
* Simulate Current Output Range: 0- 24.00 mA, ± (0.05% Rdg+5lsd
* Loop Voltage: 28V± 5%

- Measurement Function
* AC Voltage Measurement Range: 0-700V, ± (0.8% Rdg+50lsd)
* DC Voltage Measurement Range: 0-1000V, ± (0.8% Rdg+50lsd)
* AC Current Measurement Range: 0-10A, ± (0.8% Rdg+40lsd)
* DC Current Measurement Range: 0-10A, ± (0.05% Rdg+6lsd)
* Resistance Measurement Range: 0-40MΩ ± (0.1% Rdg+6lsd)
* Frequency Measurement: 0-50 KHz, ± (0.05% Rdg+5lsd)
* Diode Test: 0-2.5V, ± (1% Rdg+5lsd)

- FEATURES
1) Digital Multimeter and loop calibrator in one tool
2) Clear LCD with backlight; 4, 000 counts (30, 000 counts for DC current)auto/manual range, basic sampling rate: 2.5 times/sec.
3) Measure AC and DC volts, AC and DC current, resistance, continuity, and frequency
4) Indicator of over-range: -OL-.
5) 1000V overload protection on V, ohms, frequency, 400 mA digital multimeter
6) 25% Manual Step plus Auto Step and Auto Ramp on mA output.
7) 0.1% DC voltage accuracy, 0.05% DC current accuracy, 1 ´A resolution to 30 mA
8) Simultaneous mA and % of scale readout
9) True RMS AC voltage measurement to 1 KHz
10) Frequency measurement to 20 KHz
11) Min/Max/Average/TouchHold/Relative modes
12) Diode test and continuity beeper
13) DC current source/loop calibrator
14) 20 mA current source/simulator
15) Simultaneous mA and % of scale readout
16)Ni-MH rechargeable batteries: Rechargeable triple A battery 6X1.2V.
17) When the total voltage of battery lower than about 6V, the symbol appears.
18) Work Temperature: 0º C~30º C (relative humidity 0~80%)
19) 31º C~51º C (relative humidity 0~50%)
20) Storage Temperature: -20º C~60º C (relative humidity < =80%)
21) Sea Level Height: Work below 2000m Storage below 10000m
22) Volume: 200mm X 100mm X 40mm
23) Weight: About 600g

- Source Output Model:
* Range: 0mA-24mA.
* Accuracy: ± (0.05% of reading +5 counts), resolution: 1uA.
* Circuit Voltage: Standard 24Vdc.
* Load Capacity: 1K resistance when the voltage of battery pack>6V.

- Analog Output Model:
* Range: 0mA-24mA.
* Accuracy: ± (0.05% of reading +5 counts), resolution: 0.001mA.
* Loop Voltage: Standard 24Vdc, maximum 30Vdc, minimum 12V.
* Load Capacity: Deduct 2.5V from the circuit voltage

- Loop Power Model:
* Voltage: 28V± 5%.
* Current-limiting Protection: 25mA. (no short circuit as far as possible)