Tenma 72-8000 Series User manual

72-8000 Series
DC Power Supply
Instruction Manual

Introduction
Thank you for purchasing our product.
In order to ensure correct installation, operation and optimum performance of this product please read this
manual in detail and keep for future reference.
This instrument is produced under strict quality control. All parts go through screening and ageing, and a
series of performance testing, environmental testing and safety testing. In order to guarantee safe use, and
the best working performance, working environment guidelines must be followed.

Contents
1. Summary......................................................................................................................................................................................................... 3
2. Specifications ............................................................................................................................................................................................ 3
3. Applications ................................................................................................................................................................................................. 6
4. Description of panel............................................................................................................................................................................... 6
5. Applications ................................................................................................................................................................................................. 7

1.Summary
72-8000 is a series of general DC power supplies suitable for laboratory use.
Both CH1 and CH2 may work in CV or CC mode, and these two modes convert automatically according to the
load. CH1 and CH2 have auto tracking function. In this condition, the output of CH2 tracks the output of
CH1. This function is usually used when adjustable symmetrical and double polarity power is required.
Both CH1 and CH2 display the output voltage or current with a 3-digit-LED meter.
CH3 is a 5V fixed output. Its maximum output current is 2A, and it is usually used in TTL circuits etc.
CH1, CH2 and CH3 all have overload protection.

2.Specifications
Output Voltage and Current:
Model CH1, CH2
Voltage
CH3
Voltage
CH1, CH2
Current
CH3
Current
72-8690 0V – 32V / 0A – 3A /
72-8695 0V – 32V 5V 0A – 3A 2A
72-8700 0V – 32V / 0A – 5A /

CH1 and CH2
Load Regulation: CV: ≤1X10-4 +2mV; CC≤20mA
Ripple and Noise: CV: ≤1mVrms; CC: ≤1mVrms
Adjustable Resolution: CV: ≤20mV (typical)
CC: ≤50mA (typical)
Interactive Regulation: CV: 5X10-5 +1mV
CC: <0.5mA
Tracking Error: 5X10-3 +2mV
CH3
Output Voltage: 5V
Output Current: 0-2A
Ripple and Noise: ≤3mVrms

Ambient Temperature Range:
Operating: 0°C - 40°C
Storing: +5°C - +45°C
Power Source: AC220V±10%， 50Hz±4%
Dimensions (H x W x D): 152mm x 197mm x 305mm
Weight: Approx. 9.5kg
MTBF: ≥2000h
Accessories
Check the meter for any damage or exposed metal parts. Packaging should include the following accessory
items - if any differences or damage, please contact the nearby sales offices:
 Power cord 1 pcs
 Instruction manual 1 pcs

1.Description of Panel
1) Voltage meter
2) Current meter
3) VOLTS: Adjusts the output voltage at CV mode
4) CURRENT: Adjusts the output current at CC mode
5) MODE: Controls two main channels. Works in FREE
mode or TRACK mode.
6) MEASURE: Selects the digital meter’s display, the output
voltage or the output current
7) Ground of instrument
8) Output terminal of CH1
9) Output terminal of CH2
10) Output terminal of CH3
11) POWER: Push in to turn on the power.

2.Applications
The left area of panel corresponds to CH1 and the right area of panel corresponds to CH2. When the left
MEASURE is pushed out, the CV lamp switches on, and the left digital meter displays the output voltage of
CH1. When this button is pushed in, the CC lamp switches on, and the left digital meter displays the output
current of CH1. CH2 is same as CH1.
When the MODE button is pushed out, each CH1 and CH2 works independently. When this button is
pushed in, CH2 tracks to CH1.
The output of CH1 and CH2 are suspended. You can set the negative level of output by connecting the
reference point to the “-”terminal.
Each CH1 and CH2 can output from:
0V to 32V and from 0V to 3A (adjustable)
0V to 64V and from 0A to 3A current (adjustable in series)
0V to 32V and from 0A to 6A (adjustable in parallel)
The “-”terminal of III channel has been connected to the ground.
A protective grounding connection is essential for safe operation. This is helpful to reduce the ripper and
also the 50Hz noise.

**END**
Operating Manual content is subject to change without notice!
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Springboro, Ohio 45066-3001
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