Huazheng HZ-1025 User manual

HZ-1025
Petroleum and synthetic liquid
water separability tester
Huazheng Electric Manufacturing (Baoding) Co., Ltd

Contents
I. Overview...................................................................................................................................1
II.Key Function and Feature..................................................................................................1
III. Major Technical Indicators...............................................................................................2
IV. Assembly and use...............................................................................................................2
V. Fault analysis and troubleshooting....................................................................................... 3
VI. Precautions..............................................................................................................................4
VII. Packing List..........................................................................................................................5

1
I. Overview
The HZ-1025 petroleum and synthetic liquid water separability tester is designed and
manufactured in accordance with the national standard GB/T7305 ASTM D1401. This
instrument is suitable for measuring oils with a kinematic viscosity of 28.8～90mm²/s at
40 ℃. The test temperature is 54 ±1℃. It can also be used to determine oils with a
kinematic viscosity greater than 90mm²/s at 40℃, but the test temperature is 82±1℃.
II. Key Function and Feature
1-Temperature control table
2-Chronograph
3-Power switch
4-Mixing switch
5-Sample stirring switch
6-Lighting switch
7-Reset switch
8-lamp holder
9-Sample stirring motor
10-Pole
11-Stirrer
The HZ-1025 petroleum and synthetic liquid water separability tester is mainly composed
of thermostat, control device and heating device.
The thermostat is composed of a thermostat and a stirring motor.
The control device consists of a potentiometer and a control switch.
The heating device is composed of a heating tube.

2
III. Major Technical Indicators
1. Input power: ＜830W
2. Heating power: 800W
3. Power supply: AC220V/50Hz
4. Temperature control range: room temperature～85℃
5. Temperature control accuracy: ±0.2℃
6. Number of test holes: 3 holes
IV. Assembly and use
After unpacking the instrument, carefully remove the packaging, and install it as
shown in the figure after checking that there is no damage.
1. Place the instrument steadily and the tilt angle is less than 45 degrees.
2. Insert the sensor plug, bath stirring motor plug, and heating tube plug into the
corresponding sockets on the rear panel.
3. Clamp the test tube containing the sample with a clamp and place it on the upper
cover steadily.
4. Connect the power supply and ground the instrument well.
5. Turn on the power switch (Figure 3) and the stirring switch (Figure 4), and set the
required values for the test according to the temperature control meter operation mode.
After the instrument is powered on, the upper row of the temperature control meter
displays the main control temperature measurement value, and the lower row displays the
main control set value.
If the upper row shows OVER, it means the sensor is open or the input signal
exceeds the measurement range.

3
Set value change method
Press the key, the upper row displays SP. Press ▲ or ▼ key to make the lower row
display the required value. Press again or go to standard mode.
Control parameter change method
Press the key for more than 4 seconds, the upper row displays the prompt of the
control parameter, and press the ▲ or ▼ key to make the lower row display the required
value. Continue to press the key, the upper row will display the prompts of each parameter
in turn, press the ▲ or ▼ key to make each control parameter the required value. Press
the key for more than 4 seconds to return to the standard mode. (It will automatically
return to the standard mode after 1 minute without key press)
The function parameters are shown in the table below
Prompt
name
set range
description
Initial value
RESET
-99
（99.9）
~100
（100.0）℃
RESET
Only used to adjust the static
difference of proportional control
instrument
0
Re
During the auto-tuning process, press the ▲ or ▼ key for 8 seconds and then the AT
light will go out, the auto-tuning will be terminated, and the meter will control according to
the original PID parameters.
V. Fault analysis and troubleshooting
Under normal circumstances, turn on the power switch, and the power indicator does
not light up. After starting up, if the above process is found to be abnormal, it can be
analyzed and handled according to the following situations:
Fault
description
Failure analysis
Troubleshooting
Turn on the
power switch,
the indicator
Fuse blown
First check whether the
circuit is short-circuited and
replace the insurance

4
light is off
Poor power connection
Check the circuit for short
circuit
The power switch is damaged
Replace the power switch
Turn on the
water bath
stirring switch,
the motor does
not rotate
There is a problem with the
stirring switch
Replace the stirring switch
There is a problem with the
stirring motor
Replace the mixing motor
Open circuit
Check and exclude
The bath
temperature is
not constant
Solid state relay is broken
Replace solid state relay
Damaged heating tube
Replace heating tube
Sensor damaged
Replace the sensor
Temperature control table is
damaged
Replace the temperature
control table
The timer does
not show
Timer open
Check the line
The timer does
not count or
clear
Bad timer contact
Check the connection
Timer malfunction or button
switch is broken
Replace timer or button
switch
VI. Precautions
1. Keep the instrument clean, do not get water or damp into the electronic control part,
and prevent dirt such as oil samples from being spilled on the instrument.
2. The instrument should be well grounded before use to ensure the safety of operators.
3. When the instrument fails, please professional and technical personnel to deal with it,
and do not disassemble it at will.
4. This instrument is guaranteed for one year.

5
Packing List
Product model
name
HZ-1025 Petroleum and synthetic liquid
water separability tester
GB/T7305
Random files and accessories
NO.
Name
Specification type
Unit
Quantity
1
Certificate and manual
Pieces
1
2
Host
Set
1
3
Measuring cylinder
100ml
Pieces
3
4
Test tube fixture
Set
3
5
light
Pieces
1
6
Test stirring device
Set
1
7
Fuse tube
15A
Pieces
2
8
thermometer
-1～105℃
Pieces
1
9
Thermometer rubber
stopper
Pieces
1
10
"O" ring
Φ32(inside diameter)x5
Pieces
3