Nagman METCAL 1200 User manual

Metrological Dry Block
HIGH TEMPERATURE CALIBRATOR
METCAL 1200

NAG/IM/Metcal 1200/01/22 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.

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Dear User,
Thank you for selecting Nagman’s Sub-Zero
Temperature Calibrator (Dry Block) 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
[email protected]
VERSION CONTROL
Version No. Updated on Updated by
V 1.1 11-11-2022 Nagman

NAG/IM/Metcal 1200/01/22 4
CONTENTS
S.No. Description Page No.
1. Introduction …………………………………………………………..5
2. Specification…………………………………………………………….6
3. Standard Delivery & Optional Accessories ……………9
4. Parts Identification with Picture………………………….…10
5. Connection Diagram …………………………………………..…17
6. Safety Instructions ………………………………………………….18
7. Operating Instruction ………………………………………….….24
8. Troubleshooting / Maintenance……………………………..28

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1. INTRODUCTION
Precision Dry block High Master Temperature
Calibrator (METCAL 1200) is used for calibrating
RTD’s, Thermocouples, Temperature Switches,
Temperature Indicators etc.
The front panel continuously shows the current
Thermo well block temperature. Desired
temperature is set by using keypad which gives the
corresponding set value in the display.
Proper use of the instrument will provide accurate
calibration of temperature sensors.
Heater Block
The “Block” is made up of Inconel and provides a
relatively constant and accurate temperature
environment. Heaters are placed inside the tower
assembly to provide heating to the sensor.
A high precision platinum RTD is embedded at the
base of the block assembly to sense and control the
temperature of the block.
The entire assembly is suspended in an air cooled
chamber thermally isolated from the chassis and
electronics.

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2. SPECIFICATION
Range 150˚C to 1200˚C
Resolution 0.1˚C
Accuracy ±2˚C
Stability ±0.3˚C
Stabilization time 15 minutes approx.
Temperature Readout ˚C/˚F Switchable.
Heating Time (150 to 800°C) 30 minutes approx.
Heating Time (800 to 1200°C) 60 minutes approx.
Cooling time (1200 to 800°C) 30 minutes approx..
Cooling time (800 to 150°C) 130 minutes approx..
Switch Test facility Provided
Interchangeable Thermowell Multihole to suit 2 x ¼" & 1 x ½" Probes.
Other Sizes available as optional
Power Supply Standard - 230V AC, 50 Hz
Optional - 110V AC, 60 Hz
Switch contact Open/Close
Immersion Depth 105 mm
Well diameter 30 mm
Weight 11.6 kg (approx.)
Dimensions (L x D x H) 160 X 365 X 450 mm

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MEASUREMENT CAPABILITY
Input Measurement
Type Resolution Range Accuracy
mVL 0.001 0 to 100 ±(0.025% + 2µV)
mVH 0.01 0 to 1000 ±(0.025% + 10µV)
Volts 0.0001 0 to 10 ±(0.025% + 0.08mV)
mA 0.0001 0 to 25 ±(0.025% + 0.4µV)
Ohms 0.001 0 to 500 ±(0.025% +12mΩ)
KOhms 0.00001 0 to 3.5k ±(0.025% + 120mΩ)
RTD
Type Resolution Range Accuracy
Pt100 0.01 -100 to 800 ±(0.025% + 0.1⁰C)
Pt200 0.1 -100 to 600 ±(0.025% + 0.15⁰C)
Pt500 0.1 -100 to 530 ±(0.025% + 0.1⁰C)
Pt1000 0.01 -100 to 650 ±(0.025% + 0.1⁰C)
Thermocouples
Type Resolution Range Accuracy
J 0.1 -100 to 1200 ±(0.025% + 0.1⁰C)
K 0.1 -60 to 1260 ±(0.025% + 0.1⁰C)
R 0.1 150 to 1700 ±(0.025% + 0.2⁰C)
S 0.1 170 to 1700 ±(0.025% + 0.2⁰C)
N 0.1 0 to 1300 ±(0.025% + 0.1⁰C)
B 0.1 920 to 1820 ±(0.025% + 0.2⁰C)
T 0.1 0 to 400 ±(0.025% + 0.1⁰C)

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ENVIRONMENTAL CONDITIONS
This instrument should not be operated in an excessively
dusty & dirty environment and explosive zones.
The instrument operates safely under the following
conditions :
 Operating temperature : 23 ±2˚C
 Storage Temperature : -20˚C to 40˚C.
 Ambient relative humidity : 15 – 50%
Mains voltage within ±5 % of nominal
Minimum vibrations in the calibration environment.

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3. STANDARD DELIVERY & OPTIONAL ACCESSORIES
Standard Delivery
 Basic Instrument
 Test Leads, Mains Cable & Spare Fuses
 Multihole Insertion Tubes (to suit 2 x ¼” & 1 x ½”
probe)
 Tool for Insertion Tubes
 Computer Interface & “Metcal” Calibration
Software
 Calibration Certificates are issued in Accordance
with our Scope as granted by NABL per ISO/IEC
17025:2017 Standards
 Carrying Case
 Instruction Manual
Optional Accessories
 Additional Thermowells / Insertion Tubes &
Multihole – Consult us.

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4. PARTS IDENTIFICATION (Typical Photo)
Heater Block
Keypad &
Display
Front Panel

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FRONT PANEL
1.Input for
Switch Test
2.PC Interface
Connector
3.Input for
RTD, TC, mA
& Voltage Test
4.Power Inlet
Socket
(230V, 50Hz)

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1.Input for Switch Test :
Switch Test Connection details are shown below :
Select menu option in keypad, press upward key, the
display shows in
1. Switch test
2. Edit date/time.
Enter Numeric key 1.
2. Computer Interface :
To interface with Computer USB
Switch Test
READ 50
OPEN :
CLOSE : 50

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3.Input for RTD, TC, mA and Voltage Test
RTD : The RTD Input Connection details are shown below :
2 Wire Use terminals BC for 2 wire with A, B and C, D to be short
3 Wire Use terminals A, B, C for 3 wire with C, D to be short
4 Wire Directly insert to A, B, C, D.
Thermocouple : For all TC, B for Positive (+) and C for
Negative (-)
mA

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Passive Loop for 2 Wire :
Transmitter with Internal Power Supply (A for
Positive (+) and B for Negative (-))
Active Loop :
Transmitter with External Power Supply (B for
Positive (+) and C for Negative (-))
Voltage
B for Positive (+) and C for Negative (-)
* Note that this connection is for potential free contact.
4.Power Inlet Socket :
Input Supply (230V AC, 50 Hz)

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Keypad & Display :
Keypad
S.No.
Description
1
NUMERIC KEYS used to
enter
values
2
LCD.(128 x 64) Graphic display
3
SELECT KEY used to select the parameter i.e.
mvL, mvH, Volts, mA, Ohms, kOhms, T/C,
and RTD
4 & 8
Upwards /
D
ownward KEYS
5
STR KEY (Store key) used to store the input
values(Max 10 values)
6
°C/°F KEY used to select the units
7
RCL KEY (Recall key)
used to recall the stored
input values using increment and
decrement.
9
PGM
KEY
used to manually add
-
Thermocouple Cj external temperature
10
ENTER KEY used to accept selected options
or entered values.
11
CE KEY (escape key) used to cancel a
selection/edit or return to previous menu.

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Display
The Display is divided into four separate segments.
 1st line indicates the set Temperature
 2nd line indicates the Read Temperature
 3rd line indicates the Input value
(eg.: mVL, mVH, Volts. etc.)
 4th line indicates input parameters unit identification.

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5. CONNECTION DIAGRAM (Typical photo)
Temperature Sensor (UUT)
Dry Block Calibrator
Metcal 1200

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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.

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Warning- conditions that may pose hazards to the user.
 Inspect the instrument for damage before
each use. Do not use the instrument if it
appears damaged or operates abnormally
 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 operate this instrument in an
excessively wet, oily, dusty or dirty
environment and explosive zones.
 Do not operate near flammable materials.
 Do not slam the probe sheath into the
thermo well. It may cause a shock to the
sensor and affect the calibration.
 Do not leave the inserts in the instrument for
prolonged periods. It may cause damage due
to high operating temperature of the
instrument.
 This instrument and the thermometer probes
are sensitive instrument that can be
damaged. Always handle those devices with
care.
 Calibration Equipment should only be used
by Trained Personnel.

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Caution-conditions that may damage the instrument.
 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. Also
Completely unattended operation is not
recommended
 Do not use the instrument if the Cooling fan
located at the bottom of the Instrument is
out of order
 Always operate this instrument at room
temperature at 23±2˚C. Allow sufficient air
circulation for the instrument by leaving at
least 6 inches (15cm) of clearance around the
instrument
 Do not turn off the instrument at
temperatures higher than 100˚C. This would
create a hazardous situation. Select a set-
point less than 100˚C (preferably close to the
ambient temperature) and allow the
Instrument to cool before it turning OFF.
 Calibrator life time can be shortened by
continuous high temperature operation.