JB® DM™2-3 Formatted Review

JB® DM™2-3

Date of Review:

From 1-Aug-2008 To: 19-Sept-2008

Review:

Initial (upon accepting delivery),
Really like the feel of the manifold. I did not think I would like the Zeplin but it did not
take long to get used to it. I really like the dual sensor capability.

Short Term (after first use or within a few working days of Initial Review),
Very Intuitive. Really enjoy using it. As others have mentioned, I wish it came with the
proper documentation, although the instructions are not really needed.

Long Term
During field tests this manifold gauge set has been used on approximately 45 systems so
far. They have been used on systems of several different types ranging from small reach-
in coolers to large commercial walk-in freezers and coolers. They have been used on
small residential split systems and large commercial package units and dehumidification
equipment.
Refrigerant profiles used include:
R-12
R-410A
R-22
R-134A
R-401A (MP-39)
R-404A
R-409A

Personal Information: 

Forty years in Commercial Industrial Service. From 3 ton Wall mounts, to 1500 Ton
Centrifugals. Pneumatic, Electric, Electronic Controls. Specialty applications in Power
Plants, Hospitals, T.V. and Radio Stations. Communication Shelters to Large Computer
Room Environments. Now Semi-Retired. Some Tech Support, Training and Education.

Product Information: 

I am doing this field test thru my local RSES Chapter. I am using the 2 valve configuration.
http://www.jbind.com/catalog_multi-page/digital_pages.pdf

General Description:

Has a very good feel to it, and very well balanced. The case it comes in will work well
if it needs to be shipped, but the JB stays hanging in my van with my analogs.

Similar tools, or other tools by the same manufacturer, I have owned:

First Digital Manifold I’ve used. Never go back to analog. I have, and do, own a lot of
JB products, and this instrument seems to adhere to their standards.

Field Test Information:

JB Field-test from Richard………
During field test manifold gauge set was exposed to fairly heavy rain fall for
approximately ten minutes with no temperature probes inserted while evacuating a
system and so far seem to be operating normally with no apparent failures since
exposure. There has also been some exposure to refrigerant oil sprayed on face plate
while charging a system. This light spray of refrigerant oil does not appear to have
affected the manifold in any way and face plate was wiped clean with a soft paper towel
without use of any chemical cleaner.

User Defined Description/Review:

None at this time…….

Final Thoughts/Conclusions:

I think the JB sets itself apart with the dual sensors. I like being able to see SH, SC at
the same time. I also really enjoy the Delta T function. Use that almost as much as the
pressure readings.

Tool Bag Worthy or not?:

Very worthy. I have discovered a world I did not know existed. Customer support is
excellent, and the folks at JB are always ready to listen. I have bought one as a result of
this opportunity, and do not regret it.

 

This is the proposed new formatting for our HVACPROTech.com® FieldTest | Reviews | Evaluations – special thanks to site Technical Advisor Rat for his work and design input into this format. Very much appreciated. Feel free to comment on the format and suggestions for edits are welcome – make them here as a comment or email them to digital.zeus@yahoo.com

Fieldpiece® SRH2 Diagnostic Psychrometer Eval by Rat

Fieldpiece® SRH2 Diagnostic Psychrometer
SRH2 from the Fieldpiece website

The Fieldpiece SRH2 claims to make our jobs easier by providing multiple functions in one hand held unit. The SRH2 has three sensors, one for RH% two for temperature. Depending on where you place the sensors, and how you save the data, they will give you either operating parameters or calculate a target value for us. So it is more than just a multiple port temperature handle.

The SRH2 will calculate either Target Superheat or Target Evaporator Exit Temperature (TEET). TEET comes from Title 24 of the California Building Code and is used to verify airflow across the evap coil.

There are two types of sensors, Thermocouple (TC) and Negative Temperature Coefficient (NTC). The TC is a regular Type K plug and will work with any type K sensor you have. I have used my Fluke and Cooper pipe clamps in it so far and they all work fine. The SRH2 comes with a regular TC and a wetbulb TC. The wet bulb TC is just a regular bulb type TC with a sock over it that you wet and then read the wet bulb temperature. The directions are clear that we must read it quickly as the temperature will begin to rise rather fast; using the MIN function is advised in the instructions.

Each of the probes and the head unit come with directions, suggestions and even some charts. The directions are clear, concise and small enough to live in a side pocket of the tool bag for quick future reference.

The SRH2 doesn’t come with a bag like some of the other Fieldpice tools, but it does have the ribber armor we are all familiar with to protect it from bumps, drops and wear.

Packaging

The full Kit

Wet bulb TC

 Thinking about investing in a new instrument? Read comprehensive – in-field reviews of their performance before you lay down the ca$h – for them. The rest of this review including high definition images here: http://hvacprotech.forumwise.com/hvacprotech-thread8054.html only at HVACPROTech.com® The Source.