Nagman 650-H User manual

MEDIUM TEMPERATURE
DRY BLOCK CALIBRATOR
650-H

NAG/IM/650-H/01/22 2
BRIEF PROFILE
An ISO 9001-2015 certified Instrumentation company
(since 1972) serving Industries in India & Worldwide thro’ the
Manufacture & Supply of World-Class Calibration
Instruments & Systems like Temperature, Pressure & Signal
Calibrators, Black Body Calibration Sources, Pneumatic &
Hydraulic Hand Pumps, Dead Weight & Comparison Testers,
Calibration Test Benches, etc.

NAG/IM/650-H/01/22 3
Dear User,
Thank you for selecting Nagman’s Medium
Temperature Dry Block Calibrator and
becoming a proud owner of this Calibration
Instrument.
We have strived hard to ensure the accuracy
of the contents of this manual. We would
appreciate any suggestions/feedback to
correct any errors noticed and to improve
the quality of contents of this Manual
Specifications are subject to change owing to
continuous development and we reserve
rights to effect Changes / Modifications to
this Manual.
Read the Instructions before starting to use
the Product.
Wishing you for a long association with us.
For any service related issues, please contact
VERSION CONTROL
Version No. Updated on Updated by
V 1.1 01.09.2022 Nagman

NAG/IM/650-H/01/22 4
CONTENTS
S.No. Description Page No.
1. Introduction …………………………………………………………..5
2. Specification…………………………………………………………….6
3. Standard Delivery & Optional Accessories ……………7
4. Parts Identification with Picture ……………………………8
5. Connection Diagram ………………………………………….…9
6. Safety Instructions ………………………………………………….10
7. Operating Instruction ………………………………………….….16
8. Troubleshooting / Maintenance……………………………..21

NAG/IM/650-H/01/22 5
1. INTRODUCTION
Nagman’s Medium Temperature Dry Block Calibrator
– Model 650-H is used for calibrating RTD’s,
Thermocouples, Temperature Switches, Temperature
Indicators etc.
Temperature controller Nagman 172 is used in this
instrument, having two levels in the temperature
profile determined as RAMP and SOAK between Set
temperature point (SP) and Set time. At the time of
calibration “RUN” indication is active in the controller
continuously shows the current “Block” temperature.
Desired temperature is set in the Nagman 172
controller by “P” key for accessing the input
parameter and pressing / to increase and
decrease the value.
Proper use of the instrument will provide accurate
calibration of temperature sensors.

NAG/IM/650-H/01/22 6
2. SPECIFICATION
Range 50°C to 650°C
Resolution 0.1°C
Accuracy ±1.2°C
Stability ±0.5°C
Stabilisation Time 15 Minutes
Well Diameter 30 mm
Immersion Depth 110 mm
Heating Time (Ambient to
max.)
20 Minutes approx.
Cooling Time max. (to
100°C)
60 Minutes
Switch Test facility Provided
Interchangeable
Thermowells
Single hole to suit 1/4" & 1/2" Probes.
Other Sizes / Multihole available as
optional.
Housing / Mounting Bench-top
Power Supply 230V AC, 50 Hz
Instrument Dimensions (L x
D x H)
160 x 330 x 350 mm
Instrument Weight
(approx.)
8.5 Kg.
Operating Temperature
Range (Ambient)
15 – 40°C
Storage Temperature
Range
10 – 50°C
Humidity Range 40 -75%RH
Protection Class IP52

NAG/IM/650-H/01/22 7
3. STANDARD DELIVERIES & OPTIONAL ACCESSORIES
Standard Delivery
Basic Instrument
Test Leads
Mains Cable
Insertion Tubes (to suit 2x1/4“ & 1x1/2“ probes)
Tool for Insertion Tubes
Spare Fuses
Carrying Case
Traceable Calibration Certificate
Instruction Manual
Optional Accessories
Additional Thermowells / Insertion Tubes (to choose
from) :
Single hole standard sizes to suit 1/8”, 1/4”, 3/8”,
1/2”, 3/4” & 3, 4, 5, 6, 7, 8, 10, 12, 13, 15, 17, 19 & 21
mm probes
Multihole (Typical) : (1x6 + 1x8) or (3x6) or (1x10 +
1x4) mm
Computer Interface
“Caltemp” Calibration Software
Reference Thermocouple
Dual Voltage Selection (110V & 230V AC)
Power Supply 110V AC, 60 Hz
Calibration Certificates are issued in Accordance with
our Scope as granted by NABL per ISO/IEC
17025:2017 Standards

NAG/IM/650-H/01/22 8
4. PARTS IDENTIFICATION
1
2
4 3
5
6
7
8
9
1. Heater Block
2. PID Controller
3. Computer Interface
4. Switch Test
5. Control Fuse
6. Selector Switch
7. Heater fuse
8. Transformer fuse
9. Main Switch

NAG/IM/650-H/01/22 9
5. CONNECTION DIAGRAM
Temperature
Sensor (UUT)
Measuring Instrument
(for UUT)
650-H - Universal Dry Block
Medium Temperature Calibrator

NAG/IM/650-H/01/22 10
6. SAFETY INSTRUCTIONS
Symbols Used
S.
No. Symbol Description
1.
Read the user manual before operating
the instrument.
2.
Warning- conditions that may pose
hazards to the user.
3. Caution-conditions that may damage the
instrument.
4.
Special Information
5.
Hot surface- areas which are at high
temperature
6.
Electric shock- condition that may pose
shock to the user.

NAG/IM/650-H/01/22 11
This calibrator is designed for interior use only.
Inspect the instrument for damage before each use.
Do not use the instrument if it appears damaged or
operates abnormally.
If the instrument is used in a manner not in accordance
with the equipment design, the instrument may get
damaged.
Do not place the instrument under a cabinet or other
structure. Leave enough clearance to allow for safe and
easy insertion and removal of probes.
Do not drop the probe stems into the “well”. This type of
action can cause a shock to the Sensor.
Do not use this instrument for any application other than
the calibration work. Any other use of the instrument
may cause unknown hazards to the user.
Do not operate near flammable materials.
Calibration Equipment should only be used by Trained
Personnel.
Completely unattended operation is not recommended.

NAG/IM/650-H/01/22 12
This instrument and the thermometer probes are
sensitive instrument that can be damaged. Always
handle those devices with care.
Do not leave the inserts in the instrument for prolonged
periods. It may cause damage due to high operating
temperature of the instrument.
Do not slam the probe sheath into the well. It may cause
a shock to the sensor and affect the calibration.
Do not operate this instrument in an excessively wet,
oily, dusty, or dirty environment, or in explosive zones.
Always operate this instrument at room temperature
between 10˚C and 40˚C. Allow sufficient air circulation
for the instrument by leaving at least 20 cm of clearance
around the instrument.
Continuous high temperature operation may lead to
shorten the life time of the components.
Use of this instrument at HIGH TEMPERATURES for
extended periods of time requires caution
The high temperature present in dry-wells designed for
operation at more than 650˚C may result in fires and
cause severe burns if safety precautions are not
observed.

NAG/IM/650-H/01/22 13
Do not turn off the instrument at temperature higher
than 100˚C. This would create a hazardous situation.
Select a set-point less than room temperature and allow
the Instrument to cool before it turning OFF.
Do not use the instrument if the cooling fan built-in at
the bottom of the Instrument is out of order.
Ensure a free supply of air to the fan grill located at the
back of the Instrument.
Check that earth connection for the instrument is
available and then plug the Power cord
STORING AND TRANSPORTING THE CALIBRATOR:
The following guidelines should always be observed when
storing and transporting the calibrator. This will ensure that
the calibrator remain in good working order.
Storing:
Switch OFF the calibrator (below 100˚C) using the power
control switch.
If you intend to store the calibrator in the packing box
after use, you must ensure that the instrument has
cooled to a temperature within the storage temperature
range (10˚Cto 50 ˚C) – very close to ambient temperature
before placing it in the Packing Box

NAG/IM/650-H/01/22 14
Transporting:
The Inserts must be removed to avoid damage to the
instrument if the calibrator is to be transported for long
distances
Do not touch the well access surface of the instrument.
The block vent may be very hot due to the fan blowing
across the heater block of the instrument.
Do not touch the well or the Insert while the calibrator is
heating up, they may be very hot.
Do not touch the tip of the sensor (as well as the portion
immersed in the well) when it is removed from the Insert
/ well, it may be very hot.
The air over the well can reach temperatures greater
than 200˚C for high temperature (400˚C and higher) dry-
wells. Probes and Inserts may be hot and should only be
inserted or removed from the instrument, when the
instrument is set at temperatures less than 50˚C. Use
extreme care when removing hot inserts.
Do not touch the handle of the calibrator during use – it
may be hot.

NAG/IM/650-H/01/22 15
This instrument must be plugged into a 230V AC,
50Hz (Optional 115V AC, 60Hz), electric outlet only.
The power cord of the instrument is equipped with a
three-pin grounding plug for protection against
electrical shock hazards. It must be plugged directly
into a properly grounded three-pin socket. The
receptacle must be installed in accordance with local
codes and ordinances. Do not use an extension cord
or adapter plug.
If supplied with user accessible fuses, always replace
the fuse with one of the same rating, voltage, and
type.
Always replace the power cord with an approved
cord of the correct rating and type.
Turn off the Instrument immediately, during main
power fluctuation. Power bumps from brown-outs
could damage the instrument. Wait until the power
has stabilized.
Do not remove the fuse box from the socket until the
power cord has been disconnected.
If the fuse blows immediately after you have
replaced them, the calibrator should be returned to
the manufacturer for service.

NAG/IM/650-H/01/22 16
7. OPERATING INSTRUCTION
Display Panel:
Not to be used
When configuring a parameter, the display alternates
between the parameter prompt and its value (the
parameter value is shown with a light blinking to
differentiate it from the parameter prompt).
P Key: Used to walk through the menu parameters.
Increment and Decrement key: allow altering the
values of the parameters.
F Key: accesses special functions: RUN (toggles YES/NO)
and the two modes of timer control – FACTORY
CONFIGURED AND NOT TO BE USED DURING CALIBRATION
The display indicator also the signs AT, OUT, RUN ALM and
COM:
AT : Stays ON while the controller is in tuning process.

NAG/IM/650-H/01/22 17
OUT : For relay or pulse control output; it reflects the
actual state of the output.
RUN : Indicates that the controller is active, with the
control output and alarms enabled. (RUN=YES).
ALM : Signalize the occurrence of alarm condition. It lights
when either alarm is active.
COM : Flashes when there is RS485 activity.
The parameters are grouped in levels according to their
functionality and operation easiness. The 5 levels of
parameters are:
1 – Operation Level
2 – Tuning Level
3 – Alarms Level
4 – Configuration Level
5 – Calibration Level
The “P” key is used for accessing the parameters within a
level. Keeping the “P” key pressed, at every 2 seconds the
controller jumps to the next level of parameters, showing
the first parameter of each level:
PV >>
atvn
>>
fv
a
1
>>
type
>>
pass
>> PV …
To enter a particular level, simply release the “P” key when
the first parameter in that level is displayed.
Factory settings (eg: Temperature Unit in
C) are made for
user friendly operation and not to be altered without a
Trained Personnel.

NAG/IM/650-H/01/22 18
PROCEDURE (SET POINT / UNIT):
Connect the power cable to the Dry Block Calibrator.
Switch ON the instrument
Press the “P” key, it preparing to access the input
parameter by showing “RUN 0.00”
Again press “P” key, which shows “SP 0.00” to enter the
set point of temperature.
Set the required temperature in the PID Controller as
follows.
Press ““ key to increase the set temperature (C).
Press ““ key to decrease the set temperature (C).
After entering the set point of temperature, Long Press
the “P” key display moves to next parameter,
approximately at every 2 seconds and take your hand
from “P” key after reaching “PASS” in the controller.
Then it get started to reach the Set point of temperature.
Insert the sensors, which are going to be calibrated into
the corresponding hole of the insert.
Allow the bath to stabilize at the set temperature.

NAG/IM/650-H/01/22 19
Connect test probe to the indicator and note down the
readings of test probe and same steps can be followed
for other set of calibration points.
After calibration is over, set the bath temperature to
ambient and allow it to cool.
After reaching the ambient temperature, switch off the
power supply.
For UNIT change (C to F) Keeping the “P” key pressed,
at every 2 seconds the controller jumps to the next
level of parameters, showing the first parameter of
each level:
PV >>
atvn
>>
fv
a
1
>>
type
>>
pass
>>
simply release the P key when the “type” parameter in
that level is displayed
and press “
P
” key till the
display reads “unit” i.e. fLtr
>>dPPo >> unit >>
and simply release “P” key. Display reads with “C” press
/ key to change the temperature indication unit in
“F” and long press the “P” key, display moves to next
parameter, approximately at every 2 seconds and take
your hand from “P” key after reaching “PASS” in the
controller. Same procedure to be followed for changing
the unit in “F” to “C”.
Note : “F” key not to be used in this temperature instrument
during calibration.

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SPECIAL NOTES / INSTRUCTIONS:
Following special notes / Instructions are to be followed
strictly, for trouble free & safe operation.
1. All the parameters are factory configured. Though there
are 5 levels of controller parameter configuration, users
are strictly advised to change “SET point” alone & “UNIT”
(if required) functions which is shown in procedure.
2. MEDDLING through other function / parameter may lead
to malfunction of the unit, such as improper display
indication, over heating and may also lead to physical
hazards.
3. If you get struck during configuring any of the user
allowed parameters, (“SET point” & “UNIT”) simply come
out of the configuration procedure without entering “P”
key.
Switch Test
Connect the output of thermostat switch to the switch
test sockets using the test probes supplied.
If the thermostat switch is “Normally Closed”, the LED
indication will glow and will stop glowing when the
switch changes its state.
If the thermostat switch is “Normally Open”, the LED
indication will not glow initially and will glow when the
switch changes its state.
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