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1. 77
(产品型号展示优化词： Process Multimeter 77)
Features：
Process maintenance instrument
with multifunction of digital
multimeter and process signal
source.
Loop monitoring:
Providing 24V power supply to
loop circuit and measuring the
current simultaneously.
250 HART internal feedback
resistor, making it convenient to
interface with HART module,
without an external resistor
needed.
Analogue input:
4～20mA current range set up by bit, step current output manually.
Simulating transmitter
mA and mA% displayed format.
Provide a maximum output accuracy of 0.2%, display 5-digit measured value.
Measurements:
AC voltage, DC voltage, resistance, DC current, on/off, diode.
Highest measurement accuracy is 0.5%, display 5-digit measured value of current, and the
significance of display digits is 4.
Measurement speed: 2.5 reading per second.
Am and mA% displayed format.
Data holding.
Built in self-tests with closed-case calibration (no internal calibration adjustment).
Specifications:
Output Range Output range Resoluti
on
Accurac
y
Notes
DCI 20mA 0.000～
22.000mA
0.001mA 0.2%+4 20mA with maximum load
resistance 1KΩ
SIMULATE -20mA 0.000～-
22.000mA
0.001mA 20mAwith maximum load
resistance 1KΩ
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2. LOOP 24V ±10% Maximum output current 25mA
Measurement specification
output Rang
e
Output range Resolutio
n
Accuracy Notes
DCV 50V -51.00V～51.00V 10mV 0.5%+4
ACV 500V 30.0V～510.0V 100mV 1.5%+4 45Hz～400Hz
OHM 5kΩ 0～5.100kΩ 0.001kΩ 0.5%+4 Open circuit
voltage ： 2.2V
Short circuit
current ： 0.1mA
DCI 20m
A
-22.000mA～
22.000mA
0.001mA 0.2%+4
On/off 500Ω 0.0～510.0Ω 0.1Ω warning
Threshold:
20Ω
Open circuit
voltage ： 2.2V
Short circuit
current ： 1mAdiode 2V 0.000V～2.100V 0.001V 1%+20
General specification
LCD : 61.8×29.4mm
Operating requirements:
Operating temperature: 0 to 50 ºC.
Operating humidity: ≤85%RH
Storage requirements:
Storage temperature: -25 to 60ºC
Operating humidity: ≤90% (non-condensing).
Certified as compliant to IEC / EN61010-1: 600V CAT Ⅳ, 1000V CAT Ⅲ.
Certified as compliant to IEC / ENEN61326-1 EMC standard.
Certified as compliant to IEC 60068-2-64：2008、IEC 60068-2-32：2008 with respect to
vibration.
2×1.5AA-size alkaline batteries, automatic power-off.
Size and weight: 180×90×47 mm ，about 500g.
Accessories: a pair of test leads.
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