Nahita 601/3 User manual

Version 1, May 2020
Models: 601/3 –601/5 –601/12 –601/19
Nahita Thermostatic Water Baths
User’s Manual

Version 1, May 2020
PRODUCT DESCRIPTION
Electric heating constant temperature water bath boiler is mainly used for
distillation, desiccation, concentration and warm maceration of chemicals or
biologics, it’s conventional indispensable instruments prepared in laboratories by
various universities and colleges, secondary specialized schools, scientific
research enterprises and institutions.
PRODUCT STRUCTURE
This product adopts water-trough liner which is one shot shock and extrusion
using imported stainless steel and its shell is made of high-quality cold rolled
steel and is treated with plastic spraying technology, shinny and wear-resisting.
With the electric heating pipe gripped into the water, it can heat fast and keep
high heat efficiency, low power consumption. By intellectual digital temperature
control, it will check the rise and fall of temperature so as to ensure the precision
of temperature control.
USAGE
1.The water bath shall be placed on a stable platform.
2.Add water to 50mm above the clapboard before use.
3.Connect to a power supply consistent with the requirement of this instrument
and reliably ground the grounding terminals of the socket of power supply used.
4.Open the power switch and the power supply indicator light is on. Set the
required temperature, and the temperature controller begins to display the
temperature inside the working chamber.
5.Refer to the instructions of temperature controller for digital temperature
controller and intelligent temperature controller.
6.After the set temperature is reached and it is automatically put under a
constant temperature for half an hour, it will be put in the sample tube. The
experiment is completed. Then, close the power switch and take out the sample
tube.
SAFETY PRECAUTIONS
1.The power supply must be in line with the voltage required by the product. The
power socket shall be a three-hole socket. Favorable grounding protection must
be provided.
2.During water filling, do not let the water flow in the control cabinet to prevent
electric leakage.
3.Before use, add water 50mm until the water reaches above the clapboard
before use first. Then connect to power supply and heat. It is not allowed to heat
with insufficient water.
4.During use, do not touch the heating pipe by your hands to avoid being
scalded.
5.After use, timely discharge the water, dry it and keep it clean in order to extend
the service life.

Version 1, May 2020
TECHNICAL PARAMETERS
Model - Code
601/3 –JDD001
601/5 –JDD002
601/12-JDD003
601/19-JDD004
Controller
PID
Voltage
220V/50Hz 110V/60Hz
Power(W)
300W
600W
800W
1200W
Tem-range(℃)
RT.+5～100℃
Temperature
resolution
0.1°C
Temperature
fluctuation
≤±0.5°C
Division accuracy
≤±1°C
Timer
Continuous mode / 9999 minutes
Safety
Overcurrent protection; Over temperature alarm; Prevent dry burning
function
Chamber capacity (L)
3
6
12
18
Chamber size (mm)
160x160x130
305x160x130
305x305x130
470x305x130
Product size (mm)
200x200x220
345x200x220
345x345x220
510x345x220
Packing size (mm)
250x250x270
400x250x270
400x400x270
550x400x270
N.W/G.W
3 kg/3.5 kg
4 kg/5 kg
6 kg/7 kg
8 kg/9 kg
※OPERATION INSTRUCTION
1. Main technical parameters
1) Power：220V or 110V ± 10％.. AC ( Only one voltage can be selected according
to the type of instrument )，50~60Hz
2) Environmental temperature：-10～60℃
3) Relative Humidity：< 90%RH，No moisture condensation
4) Temperature sensor：NTC(3950) thermal resistance
5) Range of set temperature：0～100.0℃
6) Range of measure temperature：-15～115.0℃
7) Range of time：0 ～9999 minutes
8) Temperature measurement error：< 0.5%
2. Panel Instructions

Version 1, May 2020
2-1. Indicator light function
1) AUT：It flickers during self-tuning, it is not bright in any other state.
2) OUT：It is bright when heating output.
3) ALM：It is bright when there is a temperature alarm.
4) TIM：It is bright when time is set, it flickers in the process of timing.
2-2. Button function
1)【SET】： In normal state, press this button to enter the setting state.
2)【◄/AT】：“SHIFT” button. In the setting state, click this button to shift the set value.
In normal state, press this button for 6 seconds to enter the auto-tuning selection
state.
3)【▼/RES】： “DEC” button. In the setting state, click this button to decrease the set
value.
If you keep pressing this button, the value will reduce continuously. In the normal
state, when the timer ends, press this button for 3 seconds, the controller will
restart to work .
4)【▲】：“INC” button. In the setting state, click this button to increase the set value.
If you keep pressing this button, the value will increase continuously.
3. Operation and using
3-1. When the controller is switched on, all displays light up for 2 seconds, display
windows show the version number and controller model for 2 seconds, then it starts
running.
3-2. Temperature and Time Setting
1) Without Timing Function :
In the normal state , press the “SET” button to enter the temperature setting state,
windows display the prompt "SP" and the temperature set point value. Using the
“SHIFT”, “DEC” and “INC” buttons, user can edit the temperature set value. Press the
“SET” button again, the controller will return to its normal state, the setting value will
be saved automatically.
2) With Timing Function :
In the normal state , press the “SET” button to enter the temperature setting state,
windows display the prompt “SP” and the temperature set point value. Re-press the
“SET” button to enter the time setting state, windows display the prompt “ST” and
the time set point value. Press the “SET” button again, the controller will return to its
normal state, the set values will be saved automatically.

Version 1, May 2020
When the time is set to "0000", it indicates the timer is inoperative, the controller
will run continuously, the under window will display the temperature set point value.
If there is time set, the under window displays the running time, its decimal point
and the “TIME” indicator are lit, when the timer starts, its decimal point and the
“TIME” indicator flicker. When the timer ends, the under window will display the
“End” prompt, the buzzer will sound for 5 minutes, it can be muted by pressing any
button, press the “DEC” button for 3 seconds, the controller will restart to work .
3-3. If the upper window show the prompt “---”, it indicates that the temperature
sensor has faults or temperature exceeds the measuring range or the controller itself
is faulty, the controller will cut off the heat output automatically, the buzzer will
sounds continuously, “ALM” indicator is lit. Please check the temperature sensor and
its wiring carefully.
3-4. When over temperature alarm, the buzzer beeps continuously, "ALM" indicator
is lit, the heat output is cut off. If the over temperature alarm is caused by the change
of the temperature setting value, "ALM" warning light is lit, but the buzzer does not
beep.
3-5. When the buzzer sounds, press any key to mute.
3-6. Dry Heating Protector
When the water bath lack water, the independent dry heating protector will cause
the machine power off.
After adding water , take off the red knob, press the protection button for using
again.
4. Auto-tuning
In the normal state, press the “SHIFT” button for 6 seconds, the controller will enter
the auto-tuning selection state, the upper window displays the prompt “AUT”, the
Hand Reset

Version 1, May 2020
under window displays "0", change "0" to "1" by pressing the “INC” button, then
press the “SET” button, the controller will run the auto-tuning program, the “AUT”
indicator flickers. After auto-tuning end, the indicator stops flickering, PID parameter
value is saved automatically. In the auto-tuning process, press the “SHIFT” button for
another 6 seconds, the controller will stop the auto-tuning program.
During the Auto-tuning process, if over temperature alarm, the buzzer does not beep,
"ALM" indicator is not lit, the heat output will be cut off; the “SET” button is invalid,
the under window always displays temperature set point value.
5．Internal parameters settings
In the normal state, press the “SET” button for 3 seconds, windows will display
the prompt “Lc” and the password value. Adjust the password to the required
value, then press the “SET” button again, it will enter the internal parameters
setting state. Press the “SET” button for another 3 seconds, it will return to the
normal state, the set value will be saved automatically.
Parameter table 1
Prompt
Name
Function description
(Setting range)
Factory value
Lc
Password
key
When “Lc=3”, enter the next
parameters.
0
ALH
Over-temp
alarm
If “PV>(SV+ALH)”, the ALM
indicator turns on. The buzzer sounds
and the heat output turn off.
(0～100.0℃)
5.0
P
Proportional
band
Adjustment of proportional function.
(0～100.0℃)
10.0
I
Integration
time
Adjustment of integration function.
(1～2000S) 300
D
Differential
time
Adjustment of differential function.
(0～1000S) 200
T
Control cycle
The temperature control cycle.
(1～60S)
5
Pb
Temperature
deviation
correction
It is usually used to correct errors
in low temperature measurement.
Pb = Actual value –PV
(-50.0～50.0℃)
0

Version 1, May 2020
PL
Temperature
slope
correction
It is usually used to correct errors
in high temperature measurement.
PK = 1000 × (Actual value –PV) ÷ PV
(-999～999)
0
Parameter table 2
Prompt
Name
Function description
(Setting range)
Factory value
Lc-
Password
key
When “Lc=9”, enter the next
parameters.
0
doT
Temperature
decimal
point
0: No decimal point display
1: With decimal point display
(0～1)
1
ndT
Timer mode
0: No timer function.
1: Start timing when the temp
reaches the set value.
2: Start timing as soon as the
controller starts working.
(0～2)
1
Hn
Timer unit
0: Minute.
1: Hour.
(0～1)
0
SPd
Timer
parameter
If “ndT=1”, start timing when
“SV－SPd≤PV≤SV＋SPd”
(0.1～50.0℃)
0.5
EH
Timer end
mode
0: Continue to control the
temperature
1: Stop temperature control
(0～1)
0
oPn
Door
parameter
Automatic judge door opening.
0: invalid; 0: valid
(0～1)
0
nP
Power
percentage
Percentage of max heating power
output.
(0～100%) 100
Co
Heating
prohibited
deviation
When “PV≥SV+Co”,
heating output will be cut off
(0～50.0℃)
50.0
SPH
Max set
value
The maximum temperature set point
value.
(0～100.0℃)
100.0

Version 1, May 2020
Parameter table 3
Prompt
Name
Function description
(Setting
range)
Factory value
Lc
Password key
When “Lc=567”, enter the next
parameters.
0
rST
Factory reset
0: cancel; 1: confirm
(0~1) 0
6. Wiring
※Common Failures and Troubleshooting
Failure
Cause
Handling method
No power
supply
Bad contact between plug and
socket
The fuse is burnt.
Replace the plug or socket tube.
Replace the fuse with same
specification.
No temperature
rise
The temperature control
instrument is broken.
The sensor is broken.
The set temperature is lower
than water temperature.
The heating pipe is burnt.
Replace the instrument.
Replace the sensor.
Reset the temperature.
Replace the heating pipe.
The difference
between
displayed
temperature
and actual
temperature is
too big.
The temperature control
instrument is broken.
The temperature sensor is
broken.
Replace the temperature control
instrument.
Replace the temperature sensor.

Version 1, May 2020
※Storage and Transport
1.This product shall be stored in a cool and dry environment with the
temperature of -20℃～+40℃.
2.During handling, violent vibration and collision are strictly forbidden. Also,
dampness shall be prevented.
※Packing list
1.Main machine x1 pc
2.Power cable x1 pc
3.Stainless steel lid x1 pc
4.User manual x1 pc