Nagano Keiki GC62 Series User manual

1 TY-GC62-010A Rev.2
GC62
Digital Differential Pressure Gauge
User Manual
7.1

2 TY-GC62-010A Rev.2
For Proper and Safe Use
Thank you for purchasing the GC62 digital differential pressure gauge. To use this product
safely and properly, read this user manual carefully. This pressure gauge can be used for
various applications including air conditioning related equipment. Incorrect use of it causes
failures, which may result in damage including faults or accidents.
Keep this manual safely after reading it so that you can always reference it.
■
Definition of Safety Terms
Safety precautions in this manual are categorized based on the following definition:
Indicates the risk that users may suffer from damage
including death or serious injury, and extremely high
urgency at the time of occurrence of risk.
Indicates the risk that users may suffer from damage
including death or serious injury.
Indicates the risk that users may suffer from minor injury
and the risk that only property damage may be caused.
■
Description of Graphic Symbols
Graphic
symbols
Meaning
●Generally prohibited activities
Indicates prohibited activities in handling the product.
●General instructions
Indicates activities based on instructions that users are forced to
conduct.
●Other information
Indicates precautions, special operating methods, and other
important information.
DANGER
WARNING
CAUTION

3 TY-GC62-010A Rev.2
■
Precautions for Handling Product
WARNING
●Do not give excessive load, vibration, and shock.
Damage to the product and release of a measured object may
be caused, which results in injury or damage to the
surrounding environment.
●Do not apply pressure over the maximum allowable pressure.
Damage to pressure elements may be caused, which results in
injury or damage to the surrounding environment.
●Do not use this product for measured objects other than our
specification such as dry air/N2.
Damage to pressure elements and release of a measured object
may be caused, which results in injury or damage to the
surrounding environment.
●This product does not have an explosion-proof structure.
Do not use the product in dangerous places with combustible
gas or liquid which may cause ignition or explosion.
●Do not use non-designated batteries and power supply.
Use of them causes failures, fires, or electric shocks.
●Make sure that dust or misty fluid does not enter the pressure
element which may cause inaccurate measurements or
product failure.
●If failures or malfunctions of this product may threaten human
life directly or cause harm to human bodies, do not use the
product.
●Do not modify this product.
Disassembly or modification of the product, or modification to
add new functions may cause harm to human bodies.
●Use the product within the operating temperature range.
Otherwise, the product fails or is damaged, which causes
injury or damage to the surrounding environment.
●Conduct wiring correctly according to the wiring nameplate or
the wiring procedure described in the user manual. Incorrect
wiring may cause failures or fires.

4 TY-GC62-010A Rev.2
CAUTION
●Install the product according to the installation procedure
described in the user manual.
●Operate switches accurately according to the user manual.
Incorrect operation of them may cause malfunctions.
●Contact us for repair.
Disassembly or modification of the product on your own may
cause failures.

5 TY-GC62-010A Rev.2
Table of Contents
For Proper and Safe Use..........................................................2
■
Definition of Safety Terms ...............................................................................2
■
Description of Graphic Symbols.....................................................................2
■
Precautions for Handling Product..................................................................3
1. Preface ...................................................................................6
2. Model Number Structure......................................................6
3. Specifications........................................................................6
■
3.1 Product Specifications...............................................................................6
4. Dimensions............................................................................9
■
4.1 Outline Drawing of Pressure Gauge......................................................... 9
■
4.2 Wall Mount (DIN railing is attachable)...................................................... 9
5. Installation and removal.....................................................10
■
5.1 Piping.........................................................................................................10
6. Wiring and Connection.......................................................11
■
6.1 Wiring......................................................................................................... 11
■
6.2 Internal Format..........................................................................................12
■
6.3 Contact Protection....................................................................................12
7. Usage and Settings.............................................................13
■
7.1 How to Switch to Each Mode...................................................................13
■
7.2 Function Setting Mode.............................................................................15
■
7.3 Comparator Setting Mode........................................................................18
■
7.4 Comparator Operation.............................................................................20
■
7.5 Other Functions........................................................................................21
8. Measures against Noise.....................................................23
■
8.1 Effects of Noise.........................................................................................23
9. Storage.................................................................................23
■
9.1 Precautions for Storage...........................................................................23
10. Maintenance ......................................................................24
■
10.1 Periodic Inspection ................................................................................24
11. Product Warranty and Export Administration Regulations ....24
■
11.1 Product Warranty....................................................................................24
■
11.2 Export Administration Regulations......................................................24
12. Others.................................................................................24

6 TY-GC62-010A Rev.2
6:Rc1/8変換ツギテ
表示
圧力接続口
1:差圧表示
2:開平演算表示付（±表示の差圧レンジは製作不可）
1:G1/8（標準）
2:φ5タケノコ（ストレート） ビニルチューブ2m付
3:φ7タケノコ（ストレート） ビニルチューブ2m付
4:φ7タケノコ（回転） ビニルチューブ2m付
ー
□
□
□
5:φ6金属配管用ツギテ
3:パネルマウント
取付
2:壁取付
GC62
1. Preface
Check the specifications of the delivered model.
An incorrect pressure range, power supply, or output causes accidents. Be sure to use the
model appropriate for specifications in the place suited for your operating environment, and
conduct secure wiring and installation.
This is a digital differential pressure gauge equipped with a compact high pressure resistant
silicon capacitance sensor, which functions as 1 unit with 3 roles, a display, an output and a
switch function. Multi-function allows applications for various purposes including air
conditioning related facilities.
2. Model Number Structure
This chapter describes the structure of product model number:
3. Specifications
■3.1 Product Specifications
Differential pressure range
(maximum pressure display)
Accuracy
Temperature
coefficient
Pressure display
Analog
output
0 to 50Pa (50.0)
+/-50Pa (50.0)
+/-(1.5 %F.S.+1digit) +/-1.5 %F.S.
+/-0.1 %F.S./ C
(Zero & Span)
0 to 100Pa (100.0)
+/-100Pa (100.0)
0 to 200Pa (200.0)
+/-200Pa (200)
0 to 0.5kPa (0.500)
+/-0.5kPa (0.500)
+/-(1.0 %F.S.+1digit) +/-1.0 %F.S.
0 to 1kPa (1.000)
+/-1kPa (1.000)
0 to 2kPa (2.000)
+/-2kPa (2.00)
0 to 5kPa (5.00)
+/-5kPa (5.00)
0 to 10kPa (10.00)
+/-10kPa (10.00)
0 to 20kPa (20.00)
-
<Table3-1>
Installation
2:
wall mount
3:
panel mount
Display
1
: Differential pressure
2
: Open-close computing (differential pressure range with
positive and negative sign (+/-) is unavailable)
Pressure connection port
1
: G1/8 (standard)
2
: Ø5 Barb (straight) with 2m vinyl tube
3
: Ø7 Barb (straight) with 2m vinyl tube
4
: Ø6 Barb (rotary) with 2m vinyl tube
5
: Ø6 Fitting for metal pipe
6: Rc1/8 Conversion fitting

7 TY-GC62-010A Rev.2
Items
Descriptions
Display range -10 to 110 %F.S. of pressure range,
-1999 to 6000 while display scaling
Max. allowable
pressure
50 kPa (100 kPa for 10 kPa or higher)
Pressure
resistance
200 kPa
Measured object
Dry air, nitrogen (no moisture or dust should be contained)
Operating
conditions
In a normal condition, where there are no flammable gases or
liquids that cause ignition and explosion
Connection
G1/8
Gas contact
material
Silicon, aluminum, silicone, glass, ABS
Display method
4 digit LED digital display (character height: 10 mm)
Display interval
200 ms
Power supply 12 to 24V DC +/-10% (4 to 20mA output: 15 to 24V DC +/-10%)
Ripple voltage 10% (P-P) or lower
Consumption
current
55 mA or less (4 to 20mA output: 75mA or less)
Output Comparator output
Output method: 2 relay contact output
(110V AC, 0.2A resistance load)
Response speed: 5 ms or less (GC62-□□2: 10 ms or less)
Dead band: Variable (hysteresis Mode);
1%F.S. fixed (window comparator)
Delay: 0 to 2.00 s (ON/OFF)
Operation lamp: red LED (OUT 1, 2) lamp is lit when it is ON
Analog output: 4 to 20mA DC (source) or 1 to 5V DC
Response speed: 50 ms or less (no filter)
Load resistance: 400 Ω max. (4 to 20mA DC output)
10 kΩ min. (1 to 5V DC output)
Functions Extraction of square root (optional): to display wind speed & volume
Scaling: display value, analog output
Loop check: Comparator output, analog output
Filter: None, 25 ms, 250 ms, 2.5 s, 5 s, 10 s (time-constant)
*The set value is reflected in the comparator output & analog output.
Error: excessive voltage, outside pressure range during zero
adjustment
Hold: to display peak value and bottom value
Miscellaneous: one-touch zero adjustment, key lock
Protection circuit
Reverse connection of power supply
Warm-up period
15 minutes or longer (30 minutes is recommended)
Operating
temperature limits
−10 to 50°C (no condensation & freezing)

8 TY-GC62-010A Rev.2
Operating
humidity limits
35 to 85%RH (no condensation)
Storage
temperature
−20 to 60°C (no condensation & freezing)
Allowable
leakage
1.7x10-4Pa・m3/s *1
Case structure
Indoor use (equivalent to IP40)
Case material
PC/ABS (UL-94, V-0)
Weight
Approx. 95 g (panel mount), approx. 140 g (wall mount)
Accessory Panel adapter (for panel mount)
Hexagon socket head plug (for panel mount)
Unit seal (for extraction of square root function)
*1 This product cannot be used for strictly measuring the leakage such as in a leak test, etc.
<Table3-2>

9 TY-GC62-010A Rev.2
4. Dimensions
■
4.1 Outline Drawing of Pressure Gauge
■
4.2 Wall Mount (DIN railing is attachable)
Mounting hole
Low pressure side
High pressure side
(Mounting hole)
Connection port
(Low pressure side)
G1/8
2 x Ø4.5
<Fig.4-1>
Unit (Pa・kPa)
Connection port
(Low pressure side) Connection port
(High pressure side)
G1/8 G1/8
Rear view
<Fig.5-2>
Ground point
Ground point

10 TY-GC62-010A Rev.2
5. Installation and removal
For installation, select a place with less vibration, without exposure to direct sunlight, with
less humidity and little dust, and not exposed to water or oil. When using one of the pressure
connection ports open to the atmosphere, avoid places where the pressure on the
open-to-atmosphere side fluctuates (where the wind directly hits for example). When
installing in such a place, please consider preventive measures such as extension of the
tube to where there is no impact of pressure fluctuation of the atmosphere open side.
Since the main body is made of resin, please be careful not to apply a
large force, and not make scratches.
■5.1 Piping
We are offering a model that comes with apparatus for piping for this product. Please
contact the sales office for details.
Make sure to pipe the high pressure side of the applied pressure to the
connection port “H” and the low pressure side to the connection port “L”.
The pressure connection ports of the panel mount model are located on the rear side (L
and H 1 each) and on the side (L and H 1 each). Use the connection port of L and H to be
used, and fill in the other unused ports (other L and H) using the hexagon socket head plug
all way up to the main body. When the plug is used repeatedly, wrap with the seal tape and
block it so as to prevent leakage. In that case, tightening torque to the screw part should
be 1 N m or less. Torque is for the hexagon socket head plug.
(1) Panel mount
Insert the main body through the panel cutout and insert the panel adapter from the
back side. Insert the panel adapter until the gap between the panel and the panel
surface is minimized, then fix it using the attached screws. Do not overtighten the
screws.
When installing the products on the panel one after another, keep the
spacing between the panel cutout 3 mm or more left and right, 13 mm or
more above and below.
<Fig.5-1>
Panel cutout
Panel mount drawing
Panel (thickness range: 1 to 4mm)